#ifndef STR_OPERATION_HPP_INCLUDED
#define STR_OPERATION_HPP_INCLUDED

#include <string>

int  total_appear_times(const std::string&, const std::string&);
void replace_split_with_blank(std::string&, const std::string&);
void replace_some_words(std::string&);

#endif // STR_OPERATION_HPP_INCLUDED
